KR20190084402A - Apparatus and method for generating oscillating signal in wireless communication system - Google Patents

Abstract

The present disclosure relates to a 5^th generation (5G) or pre-5G communication system supporting a higher data transfer rate that a 4^th generation (4G) communication system such as long-term evolution (LTE). In a wireless communication system, a transmitter apparatus comprises: an oscillating circuit providing an oscillating signal; and a radio frequency (RF) circuit transforming a frequency of a transmitting signal by using the oscillating signal, and transmitting the transmitting signal. The oscillating circuit can generate a basic oscillating signal in the form of a differential signal, multiply a first signal and a second signal configuring the differential signal to generate a first signal set from the first signal and a second signal set from the second signal, and generate a signal, in which at least one harmonic component adjacent to an intended frequency component is suppressed, by using the first signal set and the second signal set.

Description

[0001] APPARATUS AND METHOD FOR GENERATING OSCILLATING SIGNAL IN WIRELESS COMMUNICATION SYSTEM [0002]

BACKGROUND OF THE INVENTION [0002] This disclosure relates generally to wireless communication systems, and more specifically to an apparatus and method for generating an oscillating signal in a wireless communication system.

Efforts are underway to develop improved 5G (5 ^th generation) communication systems or pre-5G communication systems to meet the increasing demand for wireless data traffic after commercialization of 4G (4 ^th generation) communication systems. For this reason, a 5G communication system or a pre-5G communication system is referred to as a 4G network (Beyond 4G Network) communication system or a LTE (Long Term Evolution) system (Post LTE) system.

To achieve a high data rate, 5G communication systems are being considered for implementation in very high frequency (mmWave) bands (e.g., 60 gigahertz (60GHz) bands). In the 5G communication system, beamforming, massive MIMO, full-dimensional MIMO, and FD-MIMO are used in order to mitigate the path loss of the radio wave in the very high frequency band and to increase the propagation distance of the radio wave. ), Array antennas, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, in order to improve the network of the system, the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Have been developed.

In addition, in the 5G system, the Advanced Coding Modulation (ACM) scheme, Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation (FQAM) and Sliding Window Superposition Coding (SWSC), and the Advanced Connection Technology (FBMC) ), Non-Orthogonal Multiple Access (NOMA), and Sparse Code Multiple Access (SCMA).

For communication in a high frequency band such as a 5G system, a terminal or a base station transmits data using a carrier wave of a high frequency. To this end, an oscillator included in the transmitter must generate a high frequency oscillation signal. Accordingly, various methods for effectively generating an oscillation signal of a high frequency have been studied.

Based on the above discussion, the disclosure provides an apparatus and method for effectively generating a high frequency oscillation signal in a wireless communication system.

The present disclosure also provides an apparatus and method for generating an oscillation signal of a desired frequency using a frequency multiplier in a wireless communication system.

The present disclosure also provides an apparatus and method for suppressing unnecessary neighboring harmonic components generated by a frequency multiplier in a wireless communication system.

According to various embodiments of the present disclosure, in a wireless communication system, a transmitter apparatus includes an oscillation circuit that provides an oscillating signal, and a processor that converts the frequency of the transmission signal using the oscillation signal, And may include a radio frequency (RF) circuit. Wherein the oscillation circuit generates a base signal oscillation signal in the form of a differential signal and multiplies a first signal and a second signal constituting the differential signal to generate a first signal set from the first signal, Signal to generate a second signal set and using the first signal set and the second signal set to generate a signal with at least one harmonic component adjacent to the intended frequency component suppressed.

According to various embodiments of the present disclosure, a method of operating a transmitter in a wireless communication system includes generating a basic oscillation signal in the form of a differential signal, multiplying the first signal and the second signal constituting the differential signal, Generating a first set of signals from a first signal and a second set of signals from the second signal; and generating at least one harmonic component adjacent to the intended frequency component using the first set of signals and the second set of signals, And generating the suppressed signal.

The apparatus and method according to various embodiments of the present disclosure enable generation of an oscillation signal of a desired frequency effectively by suppressing harmonic components using a differential signal.

The effects obtainable from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below will be.

1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure.
Figure 2 illustrates the configuration of a transmitter in a wireless communication system in accordance with various embodiments of the present disclosure.
Figure 3 illustrates an example of the generation of an oscillating signal using a frequency multiplier in a wireless communication system in accordance with various embodiments of the present disclosure.
Figure 4 illustrates an example of harmonic components generated by a frequency multiplier in a wireless communication system in accordance with various embodiments of the present disclosure.
Figure 5 illustrates the configuration of an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure.
Figure 6 illustrates an implementation of a differential transformer in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure.
FIG. 7 illustrates an implementation of a frequency body portion in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure.
8A and 8B illustrate implementations of the adjacent harmonic component suppressor in an oscillator in a wireless communication system according to various embodiments of the present disclosure.
Figure 9 illustrates an implementation of a non-adjacent harmonic component suppressor in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure.
10A and 10B illustrate implementations of an oscillator in a wireless communication system according to various embodiments.
11 shows a flow diagram of a transmitter in a wireless communication system according to various embodiments.

The terms used in this disclosure are used only to describe certain embodiments and may not be intended to limit the scope of other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this disclosure may be interpreted as having the same or similar meaning as the contextual meanings of the related art and, unless explicitly defined in the present disclosure, include ideally or in an excessively formal sense . In some cases, the terms defined in this disclosure can not be construed to exclude embodiments of the present disclosure.

In the various embodiments of the present disclosure described below, a hardware approach is illustrated by way of example. However, the various embodiments of the present disclosure do not exclude a software-based approach, since various embodiments of the present disclosure include techniques that use both hardware and software.

The present disclosure relates to an apparatus and method for generating an oscillating signal in a wireless communication system. Specifically, the present disclosure describes a technique for suppressing a harmonic component generated in the process of generating an oscillation signal in a wireless communication system.

The terms used to refer to signals used in the following description, the terms referring to components of a circuit, the terms referring to network entities, the terms referring to components of the apparatus, etc. are illustrated for convenience of explanation. Accordingly, the present disclosure is not limited to the following terms, and other terms having equivalent technical meanings can be used.

Further, the present disclosure describes various embodiments using terms used in some communication standards (e.g., 3rd Generation Partnership Project (3GPP)), but this is merely illustrative. The various embodiments of the present disclosure can be easily modified and applied in other communication systems as well.

1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure. 1 illustrates a base station 110, a terminal 120, and a terminal 130 as a part of nodes using a wireless channel in a wireless communication system. Although FIG. 1 shows only one base station, it may further include another base station which is the same as or similar to the base station 110.

The base station 110 is a network infrastructure that provides wireless access to the terminals 120, The base station 110 has a coverage defined by a certain geographic area based on the distance over which the signal can be transmitted. The base station 110 includes an 'access point (AP)', 'eNodeB (eNodeB)', '5G node', 'wireless point', ' A transmission / reception point (TRP) ', or other terms having equivalent technical meanings.

Each of the terminal 120 and the terminal 130 is a device used by a user and communicates with the base station 110 through a wireless channel. In some cases, at least one of terminal 120 and terminal 130 may be operated without user involvement. That is, at least one of the terminal 120 and the terminal 130 is an apparatus for performing machine type communication (MTC), and may not be carried by a user. Each of the terminal 120 and the terminal 130 may include a terminal, a user equipment (UE), a mobile station, a subscriber station, a remote terminal, Wireless terminal, '' user device, 'or any other terminology having equivalent technical meanings.

The base station 110, the terminal 120, and the terminal 130 can transmit and receive wireless signals in the millimeter wave band (e.g., 28 GHz, 30 GHz, 38 GHz, and 60 GHz). At this time, in order to improve the channel gain, the base station 110, the terminal 120, and the terminal 130 may perform beamforming. Here, beamforming may include transmit beamforming and receive beamforming. That is, the base station 110, the terminal 120, and the terminal 130 may assign a directivity to a transmission signal or a reception signal. To this end, the base station 110 and the terminals 120, 130 may select the serving beams 112, 113, 121, 131 through a beam search or beam management procedure. After the serving beams 112, 113, 121, and 131 are selected, communication may then be performed through resources that are in quasi co-located (QCL) relationship with the resources that transmitted the serving beams 112, 113, 121,

If the large-scale characteristics of the channel carrying the symbol on the first antenna port can be inferred from the channel carrying the symbol on the second antenna port, then the first antenna port and the second antenna port are in a QCL relationship Can be evaluated. For example, a wide range of characteristics may be used for delay spread, Doppler spread, Doppler shift, average gain, average delay, spatial receiver parameter, Or the like.

The base station 110 and the terminal 120 or 130 illustrated in FIG. 1 transmit signals over a wireless channel. To this end, base station 110 and terminal 120 or 130 may include a transmitter for generating a radio frequency (RF) signal. The transmitter according to various embodiments may be configured as shown in FIG.

Figure 2 illustrates the configuration of a transmitter in a wireless communication system in accordance with various embodiments of the present disclosure. 2 illustrates a transmitter included in the base station 110, the terminal 120, or the terminal 130. As shown in FIG.

Referring to FIG. 2, the transmitter includes a baseband processor 210, an oscillator 220, a mixer 230, an amplifier 240, and an antenna 250. The oscillator 220, the mixer 230, and the amplifier 240 may be collectively referred to as RF circuits.

The baseband processor 210 performs various operations on the baseband signal and controls the RF circuits. For example, the baseband processor 210 may generate complex symbols by encoding and modulating a transmission bitstream according to a physical layer specification of the system. To this end, the baseband processing unit 210 may include at least one processor for operation and control.

The oscillator 220 generates an oscillation signal and provides the generated oscillation signal to the mixer 230. To this end, the oscillator may include a phase locked loop (PLL). In the case of FIG. 2, only one oscillator 220 is illustrated, but according to another embodiment, two or more oscillators that generate oscillation signals of different frequencies may be included. Alternatively, according to another embodiment, the oscillator 220 may provide oscillation signals of different frequencies to two or more mixers.

The mixer 230 up-converts the frequency of the transmission signal provided from the baseband processor 210 using the oscillation signal provided from the oscillator 220. In the case of FIG. 2, only one mixer 230 is illustrated, but according to another embodiment, more than two mixers using oscillation signals of different frequencies may be included. Although not shown in FIG. 2, according to another embodiment, a digital-analog converter (DAC) may be further included between the baseband processor 210 and the mixer 230 to convert a digital signal into an analog signal.

The amplifier 240 amplifies the power of the signal up-converted by the mixer 230. The antenna 250 radiates a signal amplified by the amplifier 240 into a radio channel. The antenna may be implemented as an antenna array comprising a plurality of antenna elements. 2, a circuit (e.g., phase shifters) for beamforming may be further included between the amplifier 240 and the antenna 250, according to another embodiment.

According to the example described with reference to Figure 2, the transmitter comprises one mixer and one amplifier. However, according to another embodiment, more than two mixers or more than two amplifiers may be included. When two or more mixers are included, the oscillator 220 may provide oscillating signals of the same or different frequencies to more than one mixer.

As shown in Fig. 2, an oscillation signal can be used for up-conversion to a high-frequency signal. Generally, an oscillation signal is generated using a PLL. At this time, by changing the design of the PLL, the oscillator can directly generate the oscillation signal of the desired frequency. Alternatively, the oscillator can multiply the oscillation signal generated by the PLL to obtain a higher frequency oscillation signal. Hereinafter, an example of obtaining an oscillation signal of a desired frequency through multiplication will be described with reference to FIG.

3 illustrates an example of generating an oscillating signal using a frequency multiplier in a wireless communication system in accordance with various embodiments of the present disclosure. FIG. 3 illustrates a case where two RF circuits use oscillation signals of different frequencies.

Referring to FIG. 3, the PLL 310 generates a base oscillation signal. For example, the frequency of the basic oscillation signal may be 5.6 GHz. Then, the basic oscillation signal is distributed to the two signals through the distribution circuit 320. For example, the distribution circuit 320 may be implemented as a coupler. The divided basic oscillation signals are input to different frequency multipliers 330-1 and 330-2, respectively. In the example of FIG. 3, the first frequency multiplier 330-1 performs an m-fold multiplication operation, and the second frequency multiplier 330-2 performs an n-fold multiplication operation. For example, m may be 3, and n may be 4. In this case, if the frequency of the basic oscillation signal is 5.6 GHz, the 16.8 GHz oscillation signal is generated by the first frequency multiplier 330-1, 2, an oscillation signal of 22.4 GHz can be generated. The oscillation signals generated by the first frequency multiplier 330-1 and the second frequency multiplier 330-2 are provided to the first RF circuit 340-1 and the second RF circuit 340-2, respectively.

As described with reference to FIG. 3, even if one PLL is used, oscillation signals of various frequencies can be generated through the multiplication operation. That is, the frequency multiplier can be used to generate oscillation signals of different frequencies as well as generate oscillation signals of a desired frequency. That is, various frequency band RF systems can be implemented using a frequency multiplier.

The frequency multiplier 430 is based on a method using a harmonic component generated by the nonlinear characteristic of the semiconductor device. When an RF signal passes through a nonlinear device (such as a transistor, a diode, etc.), harmonic components having a frequency of n times the input frequency (where n is an integer equal to or greater than 1) are generated. Therefore, in the case of using the frequency doubler, unintended signal components, that is, harmonic components, as shown in Fig. 4, can be generated.

4 shows an example of harmonic components generated by a frequency multiplier in a wireless communication system according to various embodiments of the present disclosure. Referring to FIG. 4, the input signal 420 has a frequency of f ₀ . The input signal 420 is input to a triple frequency multiplier 430, and the frequency multiplier 430 generates an output signal 404 including a signal having a frequency of 3 · f ₀ . However, the output signal 404 may further include components of the frequency component cosine components of the intended 3 · f ₀ , ie, f ₀ , 2 · f ₀ , 4 · f ₀ , 5 · f ₀ ,

Harmonics are signals that are not intended, so they need to be removed. In general, the harmonic component may be removed using the filtering characteristics of the output amplifier or by using a passive filter. However, in the case of the filtering scheme, the harmonic components (e.g., 2 · f ₀ and 4 · f ₀ components in the case of FIG. 4) adjacent to the desired signal (eg, 3 · f ₀ component in the case of FIG. 4) . In addition, since it is not easy to realize both the filtering characteristic and the wide-band characteristic at the same time, the degree of difficulty in the implementation of the broadband frequency multiplier can be increased. In other words, it may be difficult to broaden the operating frequency range of the frequency doubler when the filters or amplifiers are designed for narrowband to remove adjacent harmonic components.

Thus, the present disclosure suggests various embodiments for removing adjacent harmonic components. The structure of the oscillator according to various embodiments is as shown in FIG. Figure 5 illustrates the configuration of an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure. 5 can be understood as an example of the configuration of the oscillator 220. FIG. The names of the components used in Fig. 5 are for the sake of understanding, and the names thereof do not limit the scope of the invention.

5, the oscillator includes a basic oscillation signal generator 510, a differential converter 520, a frequency body 530, an adjacent harmonic component suppressor 540, and a non-adjacent harmonic component suppressor 550.

The basic oscillation signal generator 510 generates a basic oscillation signal. The basic oscillation signal is an oscillation signal before the frequency multiplication, and has a lower frequency than the oscillation signal required by the RF circuit. The basic oscillation signal generator 510 may be implemented as a PLL.

The differential converter 520 converts the basic oscillation signal into a differential signal. In other words, the differential transformer 520 generates another signal having a phase difference of 180 degrees from the input signal, and outputs an input signal and another signal. For example, the differential transformer 520 may be implemented with at least one inductor. However, according to another embodiment, when the basic oscillation signal is generated in the form of a differential signal, the differential converter 520 may be omitted.

The frequency component distributor 530 multiplies each of the signals constituting the differential signal. In other words, the frequency domain allocator 530 generates signals of higher frequency from each of the signals constituting the differential signal. For example, the frequency component distributor 530 may be implemented with at least one diode or at least one transistor.

The adjacent harmonic component suppression unit 540 suppresses (suppresses) the harmonic component adjacent to the intended frequency component. To this end, the adjacent harmonic component suppression unit 540 may perform a linear operation (e.g., addition, subtraction, etc.) between the signals constituting the differential signal. At this time, the specific contents of the linear operation can be changed according to the relationship between the intended frequency components and the frequencies of the basic oscillation signal. For example, the adjacent harmonic component suppression portion 540 may be implemented with at least one inductor.

The non-adjacent harmonic component suppressing unit 550 suppresses the harmonic components not adjacent to the intended frequency component. To this end, the non-adjacent harmonic component suppression unit 550 may perform a filtering operation. For example, the non-adjacent harmonic component suppressor 550 may be implemented with a band-pass filter or an amplifier having filtering characteristics.

As described with reference to FIG. 5, the transmitter according to various embodiments can effectively suppress adjacent harmonic components using the property of the differential signal. Specific embodiments of the respective components shown in Fig. 5 are described below with reference to Figs. 6 to 9. Fig.

Figure 6 illustrates an implementation of a differential transformer in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure. Referring to FIG. 6, the differential transformer 520 may be implemented with two inductors 622 and 624. When the input signal 610 having the frequency of f ₀ passes through the first inductor 622, the output signals 620-1 and 620-2 in the form of differential signals are output to the two output terminals through the second inductor 624.

FIG. 7 illustrates an implementation of a frequency body portion in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure. 7, the frequency body portion 530 may be implemented by a diode 732 or a transistor 734. [ When the differential signal type input signals 710-1 and 720-2 are inputted, the multiplied signals 720-1 and 720-2 corresponding to the input signals 710-1 and 720-2 are output, respectively. That is, output signals 720-1 and 720-2 composed of harmonics of the input signals 710-1 and 720-2, respectively, are generated. At this time, the components constituting the first output signal 720-1 generated from the first input signal 710-1 having a phase of 0 deg. Have all + phases. However, some of the components constituting the second output signal 720-2 generated from the second input signal 710-2 having the phase of 180 degrees have + phase and the remainder have + phase. Specifically, among the components constituting the second output signal 720-2, the odd-th components are expressed by the following Equation (1) and the even-th components are expressed by Equation (2) And thus has a + phase.

In Equation (1) and Equation (2), f ₀ denotes the frequency of the basic oscillation signal.

8A and 8B illustrate implementations of the adjacent harmonic component suppressor in an oscillator in a wireless communication system according to various embodiments of the present disclosure. 8A and 8B, the adjacent harmonic component suppression portion 540 may be implemented with at least one inductor 842, 844, or 846. [ FIG. 8A shows an embodiment of the adjacent harmonic component suppression unit 540 for the case where the intended multiplication value is an odd number, and FIG. 8B shows an embodiment of the adjacent harmonic component suppression unit 540 for the case where the intended multiplication value is an even number.

Referring to FIG. 8A, the adjacent harmonic component suppression unit 540 may be implemented by a first inductor 842 and a second inductor 844. When the input signals 810-1 and 820-2 constituting the multiplied differential signal pass through the first inductor 842 in different directions, the second inductor 844 subtracts the input signals 810-1 and 820-2 An output signal 820-1 is generated. As a result, even harmonic components are canceled. That is, the output signal 820-1 does not include even harmonic components but includes only odd harmonic components.

Referring to FIG. 8B, the adjacent harmonic component suppression unit 540 may be implemented by an inductor 846. When the input signals 810-1 and 820-2 constituting the multiplied differential signal are input to the same end of the inductor 846, a summed output signal 820-2 is generated between the input signals 810-1 and 820-2. As a result, odd harmonics are canceled. That is, the output signal 820-2 does not include the odd harmonic components but includes only the even harmonic components.

Figure 9 illustrates an implementation of a non-adjacent harmonic component suppressor in an oscillator in a wireless communication system in accordance with various embodiments of the present disclosure. Fig. 9 illustrates a case in which the intended multiplication factor is 3. 9, the non-adjacent harmonic component suppression unit 550 may be implemented by a filter 952 or an amplifier 954. When the input signal 910 including the odd harmonic components passes through the filter 952 or the amplifier 954, the 3 · f ₀ component is passed and the remaining non-adjacent components f ₀ and 5 · f ₀ are reduced in size. Thus, an output signal 920 dominated by 3 · f ₀ can be obtained.

According to the various embodiments described above, a high frequency oscillator according to the frequency multiplication method can be constructed. Implementations according to the various embodiments described above may be selectively combined, and examples of two combinations will now be described with reference to FIGS. 10A and 10B.

10A and 10B illustrate implementations of an oscillator in a wireless communication system according to various embodiments. FIG. 10A shows the case where the intended multiplication value is an odd number. FIG. 10A shows a case where the intended multiplication value is an even number, and the non-adjacent harmonic components ≪ / RTI > FIG.

Referring to FIG. 10A, the differential converter 1020 is implemented with two inductors, the frequency component distributor 1030 is implemented with two transistors, and the adjacent harmonic component suppressor 1040-1 includes two inductors And the non-adjacent harmonic component suppressor 1050 can be implemented as an amplifier. 10B, the differential converter 1020 is implemented with two inductors, the frequency body 1030 is implemented with two transistors, and the adjacent harmonic component suppressor 1040-2 is implemented with one inductor And the non-adjacent harmonic component suppressing unit 1050 can be implemented by an amplifier.

11 shows a flow diagram of a transmitter in a wireless communication system according to various embodiments. FIG. 11 illustrates a method of operation of a transmitter including an oscillator 220. According to various aspects, FIG. 11 can be understood as a method of operation of the oscillator 220.

Referring to FIG. 11, in step 1101, the transmitter generates an oscillation signal in the form of a differential signal. For example, the transmitter can generate an oscillation signal using the PLL, and convert the oscillation signal to a differential signal. However, if the oscillation signal generated by the PLL has the form of a differential signal, the operation of converting a single signal into a differential signal may be omitted. Thus, a first signal and a second signal having a 180 [deg.] Phase difference can be generated.

In step 1103, the transmitter multiplies the first signal and the second signal constituting the differential signal. That is, the transmitter multiplies each of the first signal and the second signal, thereby generating a second signal set including harmonic components of the first signal and harmonics of the second signal. At this time, the components of the first signal set all have a + phase, and some of the components of the second signal set can have a + phase and the remainder - phase.

In step 1105, the transmitter uses the multiplied signals to generate a signal in which at least one harmonic component adjacent to the intended frequency component is suppressed. Specifically, the transmitter linearly computes the multiplied signals. According to various embodiments, the transmitter performs a addition or subtraction operation on the first signal and the second signal to suppress at least one harmonic component adjacent to the component corresponding to the intended multiplicative value. At this time, appropriate weights may be applied to the first signal or the second signal. For example, if the intended multiplication value is an odd number, the transmitter may perform a subtraction operation. As another example, if the intended multiplication value is an even number, the transmitter can perform a addition operation.

Thereafter, although not shown in FIG. 11, the transmitter can suppress at least one non-adjacent harmonic component. For this purpose, the transmitter may utilize the filtering characteristics of the amplifier, or may use a separate bandpass filter. Then, the oscillation signal of the intended frequency is provided to the RF circuit, and can be used for frequency conversion of the transmission signal.

According to the various embodiments described above, adjacent harmonic components which are difficult to remove in the use of the frequency multiplier can be effectively suppressed. Here, suppression includes not only removing the value but also reducing it to a size smaller than a certain threshold value. And, although the output filter or amplifier is not designed to be narrowband to obtain good filtering characteristics, the oscillation technique according to various embodiments helps to widen the operating frequency range of the frequency multiplier. As a result, unnecessary harmonic components due to the frequency multiplier are suppressed, so that the burden on the design of the entire system can be greatly reduced.

Methods according to the claims of the present disclosure or the embodiments described in the specification may be implemented in hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored on a computer-readable storage medium are configured for execution by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to perform the methods in accordance with the embodiments of the present disclosure or the claims of the present disclosure.

Such programs (software modules, software) may be stored in a computer readable medium such as a random access memory, a non-volatile memory including flash memory, a read only memory (ROM), an electrically erasable programmable ROM but are not limited to, electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs An optical storage device, or a magnetic cassette. Or a combination of some or all of these. In addition, a plurality of constituent memories may be included.

The program may also be stored on a communication network, such as the Internet, an Intranet, a local area network (LAN), a wide area network (WAN), a communication network such as a storage area network (SAN) And can be stored in an attachable storage device that can be accessed. Such a storage device may be connected to an apparatus performing an embodiment of the present disclosure via an external port. Further, a separate storage device on the communication network may be connected to an apparatus performing the embodiments of the present disclosure.

In the specific embodiments of the present disclosure described above, the elements included in the disclosure have been expressed singular or plural, in accordance with the specific embodiments shown. It should be understood, however, that the singular or plural representations are selected appropriately according to the situations presented for the convenience of description, and the present disclosure is not limited to the singular or plural constituent elements, And may be composed of a plurality of elements even if they are expressed.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present disclosure should not be limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

Claims (16)

A transmitter apparatus in a wireless communication system,
An oscillating circuit for providing an oscillating signal;
And an RF (radio frequency) circuit for converting the frequency of the transmission signal using the oscillation signal and transmitting the transmission signal,
The oscillation circuit includes:
Generates a differential signal type base oscillation signal,
Generating a first signal set from the first signal and a second signal set from the second signal by multiplying a first signal and a second signal constituting the differential signal,
Wherein the at least one harmonic component adjacent to the intended frequency component using the first signal set and the second signal set is suppressed.
The method according to claim 1,
Wherein the oscillation circuit suppresses the at least one adjacent harmonic component by performing a linear operation between the first signal set and the second signal set.
The method of claim 2,
Wherein the linear operation comprises a addition operation or a subtraction operation between the first signal set and the second signal set.
The method of claim 3,
Wherein the addition operation is performed when the intended frequency component is an even multiple of the frequency of the basic oscillation signal.
The method of claim 3,
Wherein the subtraction operation is performed when the intended frequency component is an odd multiple of the frequency of the basic oscillation signal.
The method according to claim 1,
Wherein the oscillation circuit suppresses at least one harmonic component not adjacent in the signal in which the adjacent at least one harmonic component is suppressed.
The method of claim 6,
Wherein the at least one non-contiguous harmonic component is suppressed using a filtering characteristic of the amplifier or a band-pass filter.
The method according to claim 1,
Wherein the base oscillation signal comprises an output of a phase locked loop (PLL).
A method of operating a transmitter in a wireless communication system,
Generating a base oscillating signal in the form of a differential signal;
Generating a first signal set from the first signal and a second signal set from the second signal by multiplying a first signal and a second signal constituting the differential signal;
Generating a signal with suppressed at least one harmonic component adjacent to an intended frequency component using the first signal set and the second signal set.
The method of claim 9,
Wherein the generating of the at least one harmonic component suppressed signal comprises:
And performing a linear operation between the first signal set and the second signal set.
The method of claim 10,
Wherein the linear operation comprises a addition or subtraction operation between the first signal set and the second signal set.
The method of claim 11,
Wherein the addition operation is performed when the intended frequency component is an even multiple of the frequency of the basic oscillation signal.
The method of claim 11,
Wherein the subtraction operation is performed when the intended frequency component is an odd multiple of the frequency of the basic oscillation signal.
The method of claim 9,
Further comprising suppressing at least one non-adjacent harmonic component in the signal in which the adjacent at least one harmonic component is suppressed.
15. The method of claim 14,
Wherein the at least one non-contiguous harmonic component is suppressed using a filtering characteristic of the amplifier or a band-pass filter.
The method of claim 9,
Wherein the base oscillation signal comprises an output of a phase locked loop (PLL).

Images